Viewing archive of Thursday, 29 January 2015
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2015 Jan 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 29 Issued at 2200Z on 29 Jan 2015IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M2 event observed at
29/1142Z from Region 2268 (S10W17). There are currently 8 numbered
sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
days one, two, and three (30 Jan, 31 Jan, 01 Feb).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed, as measured by the ACE spacecraft, reached a peak speed of
443 km/s at 28/2146Z. Total IMF reached 11 nT at 29/1915Z. The maximum
southward component of Bz reached -8 nT at 29/1809Z. Electrons greater
than 2 MeV at geosynchronous orbit reached a peak level of 228 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on days one and two (30 Jan, 31
Jan) and quiet to active levels on day three (01 Feb). Protons greater
than 10 Mev have a slight chance of crossing threshold on days two and
three (31 Jan, 01 Feb).
III. Event Probabilities 30 Jan to 01 Feb
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 05% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Jan 165 Predicted 30 Jan-01 Feb 170/170/170 90 Day Mean 29 Jan 152
V. Geomagnetic A Indices
Observed Afr/Ap 28 Jan 005/006 Estimated Afr/Ap 29 Jan 008/010 Predicted Afr/Ap 30 Jan-01 Feb 012/015-012/015-013/015
VI. Geomagnetic Activity Probabilities 30 Jan to 01 Feb
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 35% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 25% | 30% |
| Major-severe storm | 50% | 50% | 45% |
All times in UTC
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